Boring tool



26, 195.2 W SCHIERDING 2,587,231

BORING TOOL v Filed Aug. 1! 1949 :i 6 '475 z f5; 40

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4 D 9 Zmnentorl :l @wss/ISHS M Patented Feb. 26. 1952 UNITED e STATESATENT OFFICE BORNG TOOL l William Schierding, Yellow Pine, IdahoApplication August-1, 1949, Serial No. 107,969

(Cl.f255-72) 1 claim.

My present invention relates to an improved boring tool of the typecustomarily `employed in` mining and similar operations where it 1sdesired to remove a solid core of earth and/or rock for testing purposesto ascertain the character and content of the various sub-surfacestratum.

In the conventional drill now in use it is usual to force water underpressure down through the hollow bit and the water returns uppast theexterior of the bit.

According to my invention among other improvements I propose to supplythe Water exterior of the bit proper and pass the water through the bitwall up through concentric passages to be exhausted well above the bit.

In so doing I preserve the drilled core without loss or alteration andthe removal of the intact core will vresult in lmore accuratedetermination of the matter below the earths surface.

In theaccompanying drawings I have illustrated one complete example ofthe physical embodiment of my invention according to the best mode Ihave thus far devised, but it will be understood that various changesand alterations may be made in the exemplified structure within thescope of the appended claim.

In the drawings: y

Fig. 1 is a side elevational viewof the drill bit of my invention. l

Fig. 2 is an enlarged vertical sectional view thereof.

Fig. 3 is a sectional View at line 3-3 of Fig. l.

Fig. 4 is a sectional view at line 4-4 of Fig. l.

In the accompanying drawings I have illustrated one complete example ofthe present preferred form of my invention wherein I employ a drill rod2 having a center bore 4 to which is threaded at 6 a flange ring 8 ofhead III.

The head I is fashioned with a tapered shoulder I2 and below, the headis threaded at I4 to the tubular body I6 which in turn is threaded atI8'to the reduced diameter sleeve 20. A diamond cutting ring 22 may bepositioned in the offset formed by the difference in diameter betweenthe body I6 and the sleeve 20 and the ring 22 is formed with tips 23 tot into recesses 24 of the body I6.

The sleeve 28 also has a tapered offset 25 and the sleeve is threaded at26 to the drill bit 28 which is fashioned with a series of spacedrounded, diamond cutting surfaces 30.

The body I6, sleeve 20, and bit 28 are hollow centrally, and within thebod@ and the sleeve I amx a cylinder 32 spaced from the body and 2seated' in recesses 34and38 of the head I8 and sleeve 20, respectively.

The spacing of cylinder 3'2 from the body forms an annular passage 38about the cylinder. In communication with the upper end of this passage,I employ drilled pori-,s` 48 formed through the head I8 and having upperends communicating with the bore 4. Below, I use the drilled ports 42extending through thev sleeve to the shoulder 25, and restricted'ports43 communicate between the exterior of bit 28 and the center borethereof. Spaced within and concentric with the cylinder 32, Iv positionan elongated sleeve 44 formed with vertically extending, spaced slots 45and near the lower extremity of the sleeve and proximate the inner endsof restricted ports 43 I form spaced resilient naps 48. This sleeve 44has its lower end seated in the,l recess 58 of bit 28, and forms apassage 52 between the sleeve and the cylinder 32.

The sleeve 44 is supported by head 54 to which itis threaded at 56 andthis head is formed with a squared socket 58 for the squared lower end60 of shaft 62 which. is. secured by packing nut 64,'and. sealed bypacking 66 in the head IFJ.

The upper enlarged head of shaft G2 is concave or recessed at 68 toreceive ball bearing I8 and the port 'I2 provides for lubrication of thebearing from grease stud I4 having a cap I8.

The lower face of head I0 is recessed at 'I8 for reception of the head54 which is spaced from the wall of the recessto form passage 88 to theports 82 which provide communication between the passage 52 and theexterior of head I0, at I2.

`From the above description it will be seen that as the rod anddepending elements are rotated in a hole being drilled, the bit 28 willcut a circular bore surrounding a core which moves through the centralbore of the bit into the sleeve 44. The flaps 48 grip the core andprevent the core from passing downwardly out of the sleeve when thedrill is removed from the drill hole.

The cutting elements 30 as shown extend beyond the periphery of bit 28and are concentric with the sleeve 20 above the shoulder 25 and waterunder pressure in the hollow rod 2 will pass downwardly through ports 48and passage 38 to ports 42 through which it flows exterior of the bit.The bulk of the water then flows down-l wardly about the bit 28 andinwardly under the ,bit 30 to the interior of sleeve 44 and thenceoutwardly through slots 46 to passage 52, through which it flowedupwardly to passage 18 and outwardly through ports 82 to the exterior ofdrill rod 2. A portion of the water enters through ports 43 to provideconstant flow in the event the bit becomes plugged.

When the core has filled. sleeve 44 the rod is removed from the earthand the bit and sleeve 44 may be removed and the core to be testedclisplaced intact from the sleeve.

The slots 46 may be of any desired size to allow passage of the waterbut retain the sludge from the drill, or if desired, they may be largeenough to permit the sludge to pass through and out of the core barrelor sleeve 44 with the water.

Some water from ports 42 is forced upwardly between the body I6 and wallof the drill hole to lubricate the body as well as to prohibit sludgefrom settling and binding the rotary motion of the bit.

Having thus fully described my invention what I claim as new and desireto secure by-Letters i Patent is:

A boring tool comprising a head having its upper end threaded fordetachable engagement with the lower end of a tubular` drill rod, acylindrical body 'threaded from upper and lower ends and having itsupper end removably screwed upon the lower end of said head, a couplingsleeve having a threaded upper portion removably screwed into the lowerend of said body and formed with an annular shoulder spaced downwardlyfrom the body, a cutting ring fitting about said sleeve and grippedbetween the shoulder and the lower end of said body, a tubular drill bithaving its upper end portion screwed upon the lower end' of said sleeve,there being an outwardly offset surface about the sleeve spaceddownwardly from the cutting ring, the bit being formed internally withan annular recess dening at its bottom an internal annular shoulderspaced upwardly from the lower end of the bit, said drill bit beingformed with circumferentially spaced ports spaced from its upper andlower ends and disposed in upwardly spaced relation to the lower end ofthe recess, said sleeve being formed with ports extending inwardly fromits offset surface,

a perforated sleeve extending longitudinally through the body and thecoupling sleeve' and spaced from the walls of the body and the couplingsleeve and having its lower end fitting into the recess of the bit andresting upon the shoulder at the bottom of the recess,'said sleeve beingcut to form openings registering with the ports in the bit and also formtongues extending up- 4 wardly at an inward incline across the saidports, said head being formed at its lower end with a recesscommunicating with a passage extending upwardly through the head andhaving its upper portion reduced and forming a grease port, a bearingball in said passage, a shaft fitting into said passage through thelower end thereof and having its upper end engaging the bearing ball andits lower portions protruding downwardly 'from the head and formed witha squared end, a

nut about said shaft screwed into said passage and holding the shaft inplace, a cap for said perforated sleeveftting into the recess of saidhead .in spaced relation to the wall of the recess and having its upperend abutting said nut and formed with a socket into which the squaredend of the shaft fits, a cylinder surrounding said perforated sleeve anddefining longitudinally extending inner and outer annular spaces betweenthe perforated sleeve and said body,lthe ports in said coupling sleevehaving their inner ends communicating with the bottom of the outerspace, said head being formed with vertical passages,v having theil`lower ends communicating with the upper end of the' said outer space andtheir upper ends communicating with the hollow drill rod, and said headbeing also formed with other vertical passages having upper ends Openingexternally of the head and lower ends communicating with space in therecess about the cap and communicating with the inner space about'theperforated sleeve.

WILLIAM SCHIERDING.-

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Johnson July 2, 1946

